import { connect } from 'dva';
import * as THREE from 'three'
import { useEffect, useRef } from 'react';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'
import { GUI } from 'three/examples/jsm/libs/lil-gui.module.min.js'
import { RGBELoader } from 'three/examples/jsm/loaders/RGBELoader.js'

 const fogMeshPage = (props) => {
   const sceneRef = useRef(null)
   const cameraRef = useRef(null)
   const rendererRef = useRef(null)
   const guiRef = useRef(null)
   const width = 1000; //宽度
   const height = 800; //高度
   useEffect(()=>{
    init()
   }, [])
   const init = () => {
      // 0.添加GUI
      const eventObj = {
        Fullscreen: function(){
         document.body.requestFullscreen()
        },
        Exitscreen: () => {
          document.exitFullscreen()
        }
      }
      guiRef.current = new GUI()
      guiRef.current.add(eventObj, "Fullscreen").name('全屏')
      guiRef.current.add(eventObj, "Exitscreen").name('退出全屏')

      // 1.创建3D场景对象Scene
      sceneRef.current = new THREE.Scene();

      // 4.创建一个长方体几何对象Geometry
      setGeometry()

      // 2. 定义虚拟相机部分
      setCamera()

      // 5. 坐标辅助器
      const axesHelper = new THREE.AxesHelper(500)
      sceneRef.current.add(axesHelper)

      // 3.渲染器
      setRenderer()

      // 全屏 rendererRef.current.domElement.requestFullscreen()
      window.addEventListener("resize",()=>{
        rendererRef.current.setSize(window.innerWidth,window.innerHeight);
        cameraRef.current.aspect = window.innerWidth/window.innerHeight;
        cameraRef.current.updateProjectionMatrix()
      })

   }

   // 创建相机
   const setCamera = () => {
      // width和height用来设置Three.js输出的Canvas画布尺寸(像素px)
      cameraRef.current = new THREE.PerspectiveCamera(30, width / height, 1, 3000);
      // 实例化一个透视投影相机对象
      // 根据需要设置相机位置具体值
      cameraRef.current.position.set(15, 15, 0);
      cameraRef.current.lookAt(0,0,0);//指向mesh对应的位置
   }
   // 创建几何体
   const setGeometry = () => {
      //  example 1：圆柱
      getBoxGeometry()   
   }
   // 创建渲染器
   const setRenderer = () => {
      // 创建渲染器对象
      rendererRef.current = new THREE.WebGLRenderer();
      rendererRef.current.setSize(width, height); //设置three.js渲染区域的尺寸(像素px)
      rendererRef.current.render(sceneRef.current, cameraRef.current); //执行渲染操作
      document.getElementById('webgl').appendChild(rendererRef.current.domElement);
      // 6. 轨道控制器
      const controls = new OrbitControls(cameraRef.current, rendererRef.current.domElement)

      function animate(){
        requestAnimationFrame(animate)
        controls.update() 
        // mesh.rotation.x += 0.01;
        // mesh.rotation.y += 0.01;
        rendererRef.current.render(sceneRef.current, cameraRef.current)
      }
      animate()
   }
   // 六面不同材质的立方体
   const getBoxGeometry = () => {
      const geometry2 = new THREE.BoxGeometry(1, 1, 10); 
      //创建一个材质对象Material
      const cubematerial1 = new THREE.MeshBasicMaterial({
        color: 0xff0000,
        // wireframe: true
      }); 
      const cubematerial2 = new THREE.MeshBasicMaterial({
        color: 0xaeff00,
      }); 
      const cubematerial3 = new THREE.MeshBasicMaterial({
        color: 0xffae00,
      }); 
      const cubematerial4 = new THREE.MeshBasicMaterial({
        color: 0xff0088,
      }); 
      const cubematerial5 = new THREE.MeshBasicMaterial({
        color: 0x8131e3,
      }); 
      const cubematerial6 = new THREE.MeshBasicMaterial({
        color: 0x31e3b6,
      }); 
      const mesh2 = new THREE.Mesh(geometry2, [cubematerial1,cubematerial2,cubematerial3,cubematerial4,cubematerial5,cubematerial6]); //网格模型对象Mesh

      // 设置网格模型在三维空间中的位置坐标，默认是坐标原点
      mesh2.position.set(5,0,0);
      // 创建线性雾
 
      sceneRef.current.background = new THREE.Color(0x999999)
      sceneRef.current.add(mesh2); 

    //   sceneRef.current.fog = new THREE.Fog(0x999999, 0.1, 50)
      sceneRef.current.fog = new THREE.FogExp2(0x999999, 0.1)
   }


  return (
    <div>
      <h1>雾</h1>
      <div id="webgl" style={{marginTop: 10,marginLeft: 10}}></div>
    </div>
  );
}
export default connect(({common})=>({
  userInfo: common.userInfo,
}))(fogMeshPage)